Out of band control for NUCs

Since we will not have the ready physical access we have always had with Emulab/CloudLab resources, we would really, really like to be able to remotely access the control node for base stations and other end points. (I'm not going out on the roof of the Medical Tower in a blizzard to power cycle a NUC!) Specifically we are concerned with maintaining control of NUC control nodes: at the very least the ability to reboot the node and ideally the ability to diagnose via the console.

On the hardware-side, NUCs have watchdog timers and a LAN-based management interface, but it is not yet clear how accessible the watchdog timers are and in some cases we know the LAN-based MI will not help us.

On the software-side, we may be able to mitigate problems by running the base CloudLab control servers inside of a VM on the NUC. This is assuming that the most common cause of failure would be a lock-up/freak-out of the FreeBSD boss/ops and not a hardware failure of the physical box.